Finding the Fourth Proportional to 12,379.82, 17,077.79 and 8,130.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,379.82 : 17,077.79 = 8,130.27 : x
2. Step 2: Convert to fraction form
   12,379.82/17,077.79 = 8,130.27/x
3. Step 3: Cross multiply
   12,379.82x = 17,077.79 × 8,130.27
4. Step 4: Simplify right side
   12,379.82x = 138,847,043.70
5. Step 5: Solve for x
   x = 138,847,043.70/12,379.82
6. Step 6: Final answer
   x = 11,215.59